Improvement in hinges for seat-arms of school-desks



W. B. CUGGER.

Hinges for Seat-Arms of School-Desks. No. 164,268, PatentedJune 8,I875.

INVENTOR ATTORN EYS WITNESSES TH E GRAPH l0 C0.PN 0T0 -LITH.39 & 41 PARK PLACE, NY.

UNITED STATES PATENT WILLIAM B. COGGER, OF MORRIS, ASSIGNOR TO THE SHERWOOD SCHOOL- FURNITURE COMPANY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN HINGES FOR SEAT-ARMS OF SCHOOL-DESKS.

Specification forming part of Letters Patent No. 164,268, dated J une 8, 1875; application filed March 17, 1875.

To all whom it may concern Be it known that I, WILLIAM B. GOGGER, of Morris, in the county of Grundy and in the State of Illinois, have invented certain new and useful Improvements in School-Desk Hinges; and do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of a joint or hinge for school-desks, as will be hereinafter more fully set forth. I

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure l is an outside view of the joint or hinge. Fig. 2 is an inside View of the same. Fig. 3 shows the two parts of the joint detached; and Fig. 4 is a section through the line a; at, Fig. 1.

A represents a part of the side frame of a school-desk, cast, as is usual, with a circular projection, B, to form a part of the joint-or hinge. Below this circular projection the frame A has grooves or recesses a on its inner side, as shown in Figs. 2, 3, and 4. The inner side of the projection B is provided with two recesses, b b, as shown in Fig. 3. C represents the inner end of the seat-arm, made rounding, and provided with two conical pins or lugs, d d, which are to enter the recesses 12 bin the projection B. Through the center of the projection B is made a hole countersunk on the outer side to receive a bolt, D, which passes through the end of the seat-arm C. The inner end of the bolt passes through an arm or bar, E, placed against the inner side of the seatarm, and the nut G is then tightly screwed 011 the end of the bolt. The lower end of the arm or bar E is bent to fit in one of the recesses a of the frame A, so that the arm will be held stationary, and thereby keep the nut from turning by the raising and lowering of the seat. The recesses b are so formed that when the seat-arm is thrown down for use there is very little if any strain on the bolt, but the' entire strain is borne by the pins or lugs d d against the metal at the ends of the recesses b I).

I am aware that a washer having a notch in its lower end, which engages over a stud cast upon the standard, is not new in school-desks. My invention differs from such, however, in that, by the construction and arrangement of the bar E, I obviate the necessity of a stud upon the standard and the use of a notched washer.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In combination with the frame A, having grooves a, and the seat-arm C, the bar E, extended and curved at its lower end to lie within one of the grooves a, and held by the bolt and nut, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 9th day of February, 1875.

W. B. COGGER.

Witnesses:

H. 0. JUNE, W. A. PARKER. 

